6x+12=0
    x（lnx+3.1）=0.3
    x（lnx+3.1）=0.36
    x（lnx+3.44）=0.098
    xln3.44x=0.098
    xln3.744x=0.098
    x(ln3.744x)=0.098
    x(lnx+3.44)=0.098
    x(lnx+3.1)=0.3538
    x(lnx+3.1)=0.22
    x(lnx+3.1)=0.33
    19y^2+37y-3=0
    19y^2+37y-3=0
    0.1x/1.05*0.05=x-487800
    0.1x/1.05*0.05=x-818400
    x(lnx+3.1)=0.25
    x-（0.013*x）=2757
    x-（0.013*x）=1270
    (12sinx)➗x+cosx＝1
    x-（0.013*x）=1320

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